package com.aolei.mallshop.ware.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.aolei.common.to.OrderTo;
import com.aolei.common.to.mq.StockDetailTo;
import com.aolei.common.to.mq.StockLockedTo;
import com.aolei.common.utils.PageUtils;
import com.aolei.common.utils.Query;
import com.aolei.common.utils.R;
import com.aolei.mallshop.ware.dao.WareSkuDao;
import com.aolei.mallshop.ware.entity.SkuWareHasStock;
import com.aolei.mallshop.ware.entity.WareOrderTaskDetailEntity;
import com.aolei.mallshop.ware.entity.WareOrderTaskEntity;
import com.aolei.mallshop.ware.entity.WareSkuEntity;
import com.aolei.common.exception.NoStockException;
import com.aolei.mallshop.ware.feign.OrderFeignService;
import com.aolei.mallshop.ware.feign.ProductFeignService;
import com.aolei.mallshop.ware.service.WareOrderTaskService;
import com.aolei.mallshop.ware.service.WareSkuService;
import com.aolei.mallshop.ware.vo.OrderItemVo;
import com.aolei.mallshop.ware.vo.OrderVo;
import com.aolei.mallshop.ware.vo.SkuHasStockVo;
import com.aolei.mallshop.ware.vo.WareSkuLockVo;
import lombok.Data;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

@RabbitListener(queues = "stock.release.stock.queue")
@Service("wareSkuService")
public class WareSkuServiceImpl extends ServiceImpl<WareSkuDao, WareSkuEntity> implements WareSkuService {

    @Autowired
    WareSkuDao wareSkuDao;

    @Autowired
    ProductFeignService productFeignService;

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Autowired
    private WareOrderTaskService orderTaskService;

    @Autowired
    private WareOrderTaskDetailServiceImpl orderTaskDetailService;

    @Autowired
    private OrderFeignService orderFeignService;
    /**
     * 库存自动解锁
     * @param to
     * @param message
     */
    @RabbitHandler
    public void handleStockLockedRelease(StockLockedTo to, Message message){
        System.out.println("收到解锁库存的消息");
        Long id = to.getId();
        StockDetailTo detail = to.getDetail();
        Long skuId = detail.getSkuId();
        Long detailId = detail.getId();
    }

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        /**
         * skuId: 1
         * wareId: 2
         */
        QueryWrapper<WareSkuEntity> queryWrapper = new QueryWrapper<>();
        String skuId = (String) params.get("skuId");
        if(!StringUtils.isEmpty(skuId)){
            queryWrapper.eq("sku_id",skuId);
        }

        String wareId = (String) params.get("wareId");
        if(!StringUtils.isEmpty(wareId)){
            queryWrapper.eq("ware_id",wareId);
        }


        IPage<WareSkuEntity> page = this.page(
                new Query<WareSkuEntity>().getPage(params),
                queryWrapper
        );

        return new PageUtils(page);
    }

    @Override
    public void addStock(Long skuId, Long wareId, Integer skuNum) {
        //1、判断如果还没有这个库存记录新增
        List<WareSkuEntity> entities = wareSkuDao.selectList(new QueryWrapper<WareSkuEntity>().eq("sku_id", skuId).eq("ware_id", wareId));
        if(entities == null || entities.size() == 0){
            WareSkuEntity skuEntity = new WareSkuEntity();
            skuEntity.setSkuId(skuId);
            skuEntity.setStock(skuNum);
            skuEntity.setWareId(wareId);
            skuEntity.setStockLocked(0);
            //TODO 远程查询sku的名字，如果失败，整个事务无需回滚
            //1、自己catch异常
            //TODO 还可以用什么办法让异常出现以后不回滚？高级
            try {
                R info = productFeignService.info(skuId);
                Map<String,Object> data = (Map<String, Object>) info.get("skuInfo");

                if(((R) info).getCode() == 0){
                    skuEntity.setSkuName((String) data.get("skuName"));
                }
            }catch (Exception e){

            }


            wareSkuDao.insert(skuEntity);
        }else{
            wareSkuDao.addStock(skuId,wareId,skuNum);
        }

    }

    @Override
    public List<SkuHasStockVo> getSkuHasStock(List<Long> skuIds) {
        List<SkuHasStockVo> collect = skuIds.stream().map(sku -> {
            SkuHasStockVo vo = new SkuHasStockVo();

            Long count = baseMapper.getSkuStock(sku);

            vo.setHasstock(count == null ? false : count > 0);
            vo.setSkuId(sku);
            return vo;
        }).collect(Collectors.toList());
        return collect;
    }

    /**
     * 锁定订单
     * @param vo
     * @return
     */
    @Transactional(rollbackFor = NoStockException.class)
    @Override
    public Boolean orderLockStock(WareSkuLockVo vo) {

        /**
         * 保存库存工作单
         */
        WareOrderTaskEntity taskEntity = new WareOrderTaskEntity();
        taskEntity.setOrderSn(vo.getOrderSn());
        orderTaskService.save(taskEntity);

        //TODO 近地库存
        //1、按照下单收货地就近锁定库存

        // 找到那个仓库都有库存
        List<OrderItemVo> locks = vo.getLocks();
        List<SkuWareHasStock> collect = locks.stream().map(item -> {
            SkuWareHasStock stock = new SkuWareHasStock();
            stock.setSkuId(item.getSkuId());
            stock.setNum(item.getCount());
            //查询这个商品哪里有库存
            List<Long> wareIds = wareSkuDao.listWareIdHasSkuStock(item.getSkuId());
            stock.setWareId(wareIds);
            return stock;
        }).collect(Collectors.toList());
        //锁定库存
        Boolean allLock=true;
        for (SkuWareHasStock hasStock : collect){
            Boolean skuStocked = false;
            Long skuId = hasStock.getSkuId();
            List<Long> wareIds = hasStock.getWareId();
            if (StringUtils.isEmpty(wareIds)){
                //没有库存
                throw new NoStockException(skuId);
            }
            for (Long wareId : wareIds){
                Long count = wareSkuDao.lockSkuStock(skuId,wareId,hasStock.getNum());
                if (count == 1){
                    skuStocked = true;
                    WareOrderTaskDetailEntity wareOrderTaskDetailEntity = new WareOrderTaskDetailEntity(null,skuId,"",hasStock.getNum(),taskEntity.getId(),wareId,1);
                    orderTaskDetailService.save(wareOrderTaskDetailEntity);
                    StockLockedTo lockedTo = new StockLockedTo();
                    lockedTo.setId(taskEntity.getId());
                    StockDetailTo stockDetailTo = new StockDetailTo();
                    BeanUtils.copyProperties(wareOrderTaskDetailEntity,stockDetailTo);
                    lockedTo.setDetail(stockDetailTo);
                    rabbitTemplate.convertAndSend("stock-event-exchange","stock.lcoked",lockedTo);
                    break;
                }else {
                    allLock = false;
                }
            }
            if (!skuStocked){
                //当前商品所有仓库都没有锁住
                throw new NoStockException(skuId);
            }
        }

        return true;
    }

    @Override
    public void unlockStock(StockLockedTo to) {
        //库存工作单的id
        StockDetailTo detail = to.getDetail();
        Long detailId = detail.getId();

        /**
         * 解锁
         * 1、查询数据库关于这个订单锁定库存信息
         *   有：证明库存锁定成功了
         *      解锁：订单状况
         *          1、没有这个订单，必须解锁库存
         *          2、有这个订单，不一定解锁库存
         *              订单状态：已取消：解锁库存
         *                      已支付：不能解锁库存
         */
        WareOrderTaskDetailEntity taskDetailInfo = orderTaskDetailService.getById(detailId);
        if (taskDetailInfo != null) {
            //查出wms_ware_order_task工作单的信息
            Long id = to.getId();
            WareOrderTaskEntity orderTaskInfo = orderTaskService.getById(id);
            //获取订单号查询订单状态
            String orderSn = orderTaskInfo.getOrderSn();
            //远程查询订单信息
            R orderData = orderFeignService.getOrderStatus(orderSn);
            if (orderData.getCode() == 0) {
                //订单数据返回成功
                OrderVo orderInfo = orderData.getData("data", new TypeReference<OrderVo>() {
                });

                //判断订单状态是否已取消或者支付或者订单不存在
                if (orderInfo == null || orderInfo.getStatus() == 4) {
                    //订单已被取消，才能解锁库存
                    if (taskDetailInfo.getLockStatus() == 1) {
                        //当前库存工作单详情状态1，已锁定，但是未解锁才可以解锁
                        unLockStock(detail.getSkuId(), detail.getWareId(), detail.getSkuNum(), detailId);
                    }
                }
            } else {
                //消息拒绝以后重新放在队列里面，让别人继续消费解锁
                //远程调用服务失败
                throw new RuntimeException("远程调用服务失败");
            }
        } else {
            //无需解锁
        }
    }
        @Transactional(rollbackFor = Exception.class)
        @Override
        public void unlockStock(OrderTo orderTo) {

            String orderSn = orderTo.getOrderSn();
            //查一下最新的库存解锁状态，防止重复解锁库存
            WareOrderTaskEntity orderTaskEntity = orderTaskService.getOrderTaskByOrderSn(orderSn);

            //按照工作单的id找到所有 没有解锁的库存，进行解锁
            Long id = orderTaskEntity.getId();
            List<WareOrderTaskDetailEntity> list = orderTaskDetailService.list(new QueryWrapper<WareOrderTaskDetailEntity>()
                    .eq("task_id", id).eq("lock_status", 1));

            for (WareOrderTaskDetailEntity taskDetailEntity : list) {
                unLockStock(taskDetailEntity.getSkuId(),
                        taskDetailEntity.getWareId(),
                        taskDetailEntity.getSkuNum(),
                        taskDetailEntity.getId());
            }

        }

        /**
         * 解锁库存的方法
         * @param skuId
         * @param wareId
         * @param num
         * @param taskDetailId
         */
        public void unLockStock(Long skuId,Long wareId,Integer num,Long taskDetailId) {

            //库存解锁
            wareSkuDao.unLockStock(skuId,wareId,num);

            //更新工作单的状态
            WareOrderTaskDetailEntity taskDetailEntity = new WareOrderTaskDetailEntity();
            taskDetailEntity.setId(taskDetailId);
            //变为已解锁
            taskDetailEntity.setLockStatus(2);
            orderTaskDetailService.updateById(taskDetailEntity);

        }


        @Data
        class SkuWareHasStock {
            private Long skuId;
            private Integer num;
            private List<Long> wareId;
        }
}